Red Hat Bugzilla – Bug 126210
Machine crash and Memory leak when copying a large 7G directory to another place
Last modified: 2007-11-30 17:07:02 EST
Description of problem:
Memory leak when copying a large 7G directory to the same disk or
another disk. Machines freezes when repeat the copying process another
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.cp -r /7GB_large_directory
2.cp -r /7GB_large_directory
WS3 on Dell P4 3.4GHz, 1.0G Mem, 2.0G Swap, 256M Video
Could you please attach console output with oops/panic data?
Also, what file system type is supporting the target directory?
How do I get the console output with oops/panic data? The machine is
frozen and has to be hard rebooted by swith power off and on. Please
Created attachment 101658 [details]
What's the status of this bug? I have a Dell 2650 with 3 GB RAM
running RHAS3 kernel 2.4.21-20. When I copy using cp a ~ 1 GB file
from one directory to another on the same disk, memory use goes up by
about 1 GB and stays up even after the operation is done. I
understand that the memory is used by a disk cache for later improved
copy performance. But the memory never seems to get released and
another large copy will use up all the memory, often causing a system
hang (frozen screen). Does cp really have a memory leak for large
I tried the following test:
dd if=/dev/zero of=/tmp/testfile bs=1M count=1024 ; rm /tmp/testfile
which I got from Bug 58681, and the memory used by this operation was
freed up, but the memory used by the previous 1 GB cp is still shown
Tony, please work with Customer Support to get the required data (and
then attach it here). Also, please let us know if this problem occurs
with a recent RHEL3 release (U5 or later). Thanks in advance.
Reassigning to PeterS.